Datasheet LTC2312-14 (Analog Devices)

LTC2312-14 14-Bit, 500ksps Serial Sampling ADC in TSOT
FEATURES DESCRIPTION
n
500ksps Throughput Rate
The LTC®2312-14 is a 14-bit, 500ksps, serial sampling n
No Cycle Latency
A/D converter that draws only 3.2mA from a single 3V n
Guaranteed 14-Bit No Missing Codes
or 5V supply. The LTC2312-14 contains an integrated n
Single 3V or 5V Supply
low drift reference and reference buffer providing a low n
Low Noise: 77.5dB SNR
cost, high performance (20ppm/°C maximum) and space n
Low Power: 9mW at 500ksps and 3V Supply
saving solution. The LTC2312-14 achieves outstanding n
Low Drift (20ppm/°C Maximum) 2.048V or 4.096V
AC performance of 77dB SINAD and –85dB THD while
Internal Reference
sampling at 500ksps. The extremely high sample rate-to- n Sleep Mode with < 1µA Typical Supply Current power ratio makes the LTC2312-14 ideal for compact, low n Nap Mode with Quick Wake-Up < 1 Conversion power, high speed systems. The supply current decreases n Separate 1.8V to 5V Digital I/O Supply at lower sampling rates as the device automatically enters n High Speed SPI-Compatible Serial I/O nap mode after conversions. n Guaranteed Operation from –40°C to 125°C The LTC2312-14 has a high speed SPI-compatible serial n 8-Lead TSOT-23 Package interface that supports 1.8V, 2.5V, 3V and 5V logic. The fast 500ksps throughput with no-cycle latency makes
APPLICATIONS
the LTC2312-14 ideally suited for a wide variety of high n Communication Systems speed applications. n High Speed Data Acquisition
Complete 14-/12-Bit Pin-Compatible SAR ADC Family
n Handheld Terminal Interface
500ksps 2.5Msps 4.5Msps 5Msps
n Medical Imaging 14-Bit LTC2312-14 LTC2313-14 LTC2314-14 n Uninterrupted Power Supplies 12-Bit LTC2312-12 LTC2313-12 LTC2315-12 n Battery Operated Systems Power 3V/5V 9mW/15mW 14mW/25mW 18mW/31mW 19mW/32mW n Automotive L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION 16k Point FFT, fS = 500ksps, fIN = 259kHz 5V Supply, Internal Reference, 500ksps, 14-Bit Sampling ADC
0 VDD = 5V –20 SNR = 77.5dBFS 5V SINAD = 77dBFS 2.2µF LTC2312-14 –40 THD = –85dB V SFDR = 88dB DD CONV –60 2.2µF SERIAL DATA LINK TO REF SCK ASIC, PLD, MPU, DSP –80 OR SHIFT REGISTERS –100 AMPLITUDE (dBFS) GND SDO –120 ANALOG INPUT DIGITAL OUTPUT SUPPLY A 0V TO 4.096V IN OVDD 1.8V TO 5V –140 2.2µF –160 231214 TA01 0 50 100 150 200 250 INPUT FREQUENCY (kHz) 231214 TA01b 231214fa For more information www.linear.com/LTC2312-14 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Converter Characteristics Dynamic Accuracy Reference Input/Output Digital Inputs and Digital Outputs Power Requirements ADC Timing Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagrams Applications Information Package Description Related Parts